KR20060063179A - Exterior electric sign board having function of waterproof and heat radiation - Google Patents

Abstract

The present invention relates to an outdoor electronic display board that can reduce the weight of the outdoor electronic signboard, release heat generated from the LED, and make the LED easy to maintain and completely waterproof against rain. The present invention forms a coating layer on the LED module to light up a plurality of LEDs in accordance with the electrical signal and to prevent contact with external moisture on the outer surface. The fixing plate is spaced apart from the bottom of the LED module by a predetermined distance to form a ventilation path between the LED module, and is installed on the front of the LED module to heat the heat generated from the LED surface at the same time fixing the plurality of LEDs Release into the sink. The LED module and the fixing plate are accommodated, and a vent hole is formed in the display housing so that the rear surface of the LED module is vented. Accordingly, there is an advantage that the outdoor display board having improved waterproof and light weight and improved emission of heat generated from the LED can be provided than the conventional outdoor display board having a structure filled with epoxy or silicon.

Billboard, LED

Description

Outdoor electric sign board having function of waterproof and heat radiation}

1 is an exploded perspective view schematically showing the structure of a conventional outdoor billboard.

FIG. 2 is a cross-sectional view illustrating an assembled state of the outdoor billboard of FIG. 1. FIG.

Figure 3 is an exemplary view showing a change in current and brightness of the LED according to the change in the ambient temperature.

Figure 4 is a perspective view of an outdoor billboard with a waterproof and heat dissipation function according to the present invention.

Figure 5 is an exploded perspective view schematically showing the structure of an outdoor billboard with a waterproof and heat dissipation function according to the present invention.

FIG. 6 is a cross-sectional view illustrating an assembled state of the outdoor billboard of FIG. 5. FIG.

7 is an exploded perspective view schematically showing a structure in which a light shielding member is installed in an outdoor display board according to the present invention;

(Explanation of symbols for the main parts of the drawing)

100: LED 110: LED fixing substrate

112a, 112b: Connector 120: LED control unit

200: insertion hole 210: fixed plate

220: light blocking plate 300, 310: fastening means

400: electronic board housing 410: electronic board panel

411: vent

The present invention relates to an outdoor signboard, and more particularly, to reduce the weight of the outdoor signboard, to emit heat generated from a light emitting diode (LED), and to easily maintain and maintain the LED. The present invention relates to an outdoor billboard having a waterproofing and heat dissipating function for waterproofing.

In general, it is well known that the outdoor electronic display device is widely used as a means for delivering text and images to an unspecified number using a single medium. The application range of the outdoor billboard is gradually expanded and widely used as a large guide plate of a playground, a traffic information guide plate of a road, an outdoor billboard, and the like. Next, a pixel module for an outdoor display board according to the related art constituting the outdoor display device is shown.

1 is an exploded perspective view schematically illustrating a structure of a conventional outdoor billboard, and FIG. 2 is a cross-sectional view illustrating an assembled state of the outdoor billboard of FIG. 1.

1 and 2, the conventional electronic display board is a plurality of LED (10) for implementing the characters and images, the LED fixing substrate 20, the LED fixing substrate 20 is arranged at a predetermined interval, of the LED fixing substrate 20 The pixel housing 50 and the pixel housing 50 in which the LED driving circuit 30 installed at the rear and driving the LED 10 and the LED driving circuit 30 including the LED fixing substrate 20 are installed and fixed therein. When it is installed on the sign board, the rubber packing 60 for blocking the moisture flowing into the sign board from the outside, the sign board housing 70 and the pixel housing consists of a sign board panel 80 to be fixed to the sign board through the fastening means.

The conventional outdoor electronic signboard configured as described above is configured in one type of LED 10 when implementing a single color, and red when implementing two types or full colors of LED 10 when implementing a color. ), Green and blue LEDs 10 are mixed. Each of these LEDs 10 is connected to a power source by the LED driving circuit 30 and flashes through on / off of the power source.

On the other hand, the above-described conventional outdoor electronic sign is installed inside the front of the pixel housing 50 in a state in which the LED driving circuit 30 is installed on the rear of the LED fixing substrate 20 in which the LED 10 is constantly arranged, LED fixing Liquid epoxy or silicon 90 is filled and cured on the front surface of the substrate 20.

As described above, the epoxy or silicon filled to the front of the LED fixing substrate 20 is cured by drying to seal the gap between the LED 10 and the LED fixing substrate 20 to prevent the penetration of moisture.

However, the pixel module for an outdoor display board according to the prior art has a limitation in reducing the weight of the display board because it is structurally epoxy or siliconized to reduce the damage of moisture and uses an external pixel housing. Therefore, a problem arises in the installation of a structure that can support the weight of the billboard in installing the outdoor billboard.

In addition, the LED is a lot of heat is generated during the lighting process, the outdoor display board using the epoxy according to the prior art heat generated in the LED is not emitted to the outside due to the low thermal conductivity of the epoxy is accumulated in the epoxy around the LED.

3 is an exemplary view showing the change of the LED according to the change of the ambient temperature, Figure 3 (a) is a graph showing the current change of the LED according to the change of the ambient temperature, Figure 3 (b) is a change in the ambient temperature change The graph shows the intensity change of the LED according to the graph. As shown in Fig. 3 (a), the LED maintains normal brightness only when a current of 20 mA to 30 mA is supplied. However, when the ambient temperature rises above 50 ° C, LED deterioration occurs due to heat, and the current decreases to 20 mA or less. As shown in FIG. 3 (b), as the ambient temperature increases, the current passing through the LED decreases. Therefore, there is a problem that the intensity of the light scanned from the LED is also reduced, and heat accumulated in the epoxy accelerates the degradation of the LED, thereby shortening the service life of the LED.

In addition, when silicon is used, there is a problem that the shortness of the LED may occur due to the penetration of moisture due to the gap between the silicon and the LED because the adhesion of the silicon is inferior.

In addition, the conventional outdoor display board is not easy to reduce the manufacturing cost due to the expensive epoxy price by filling the epoxy in the pixel housing, it is difficult to improve the production efficiency by increasing the manufacturing time due to the curing of the epoxy.

In addition, since the LED is fixed by epoxy, it is impossible to replace and repair only the failed LED, resulting in a problem that the entire LED pixel must be discarded.

In addition, when the LED pixel is installed in the housing of the sign board, a rubber packing is installed between the LED pixel and the sign board housing to block the inflow of moisture to the back of the LED pixel. And there is a problem that the deterioration of the rubber packing occurs due to the influence of the heat of the LED is turned on can not maintain a complete sealing state short circuit of the LED due to the inflow of moisture.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide an outdoor electronic display board that is waterproof and light in weight, and which is easy to emit heat and maintain LED.

In order to achieve the above object, the present invention provides an outdoor LED display having a waterproof and heat dissipation function, comprising: an LED module configured to coat a plurality of LEDs according to an electrical signal and to form a coating layer on an outer surface thereof to prevent contact with external moisture; A fixing plate spaced apart from a bottom surface of the LED module by a predetermined distance to form a ventilation path between the LED module and installed on the front of the LED module to fix the plurality of LEDs; A light blocking plate installed on the front surface of the fixing plate to prevent a decrease in brightness of the LED due to sunlight; And an electronic display panel housing accommodating the LED module, the fixing plate, and the light shielding plate, and having a ventilation opening to allow the rear surface of the LED module to be ventilated.

In addition, the fixing plate forms an insertion hole through which the LED penetrates in correspondence with the plurality of LEDs, closes the outer circumference of the LED passing through the insertion hole, fixes the LED, and absorbs heat generated from the LED. By emitting to the outside of the electric sign.

In addition, the fixing plate and the light shielding plate may be colored in at least one color to be compatible with the surrounding environment.

In addition, the light blocking plate is characterized in that for dissipating heat conducted from the fixing plate.

The fixing plate and the light shielding plate may be formed of at least one of a plastic molding material and a metal material.

In addition, the vent is characterized in that the replacement by inserting the LED module through the vent when the replacement of the LED module.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a perspective view showing an outdoor billboard with a waterproof and heat dissipation function according to the present invention, Figure 5 is an exploded perspective view schematically showing the structure of an outdoor billboard with a waterproof and heat dissipation function according to the present invention, Figure 6 5 is a cross-sectional view illustrating an assembled state of the outdoor display board of FIG. 5.

4 to 6, the outdoor display board includes an LED fixing substrate 120 in which a plurality of LEDs 110 are arranged in a constant arrangement, and an LED controller 130 for controlling the LEDs 110 to blink according to an electrical signal. LED module 100, and the fixing plate 210 for fixing the LED 110 to irradiate light in a constant direction without flow, and the LED housing 100 for accommodating the LED module 100 and the fixing plate 210 do.

The LED module 100 is composed of a plurality of LEDs 110 and the LED fixing substrate 120, and is installed in a plurality of horizontal and vertical constant arrangement on the front of the electronic sign housing 400. The number of installation of the LED module 100 may be appropriately set according to the size of the display housing 400.

The plurality of LEDs 110 are turned on / off according to an electrical signal and output light to the front of the display.

The LED fixing substrate 120 supports a plurality of LEDs 110 in a predetermined arrangement on the substrate.

The LED controller 130 outputs a control signal so that the LED 110 installed on the LED fixing substrate 120 blinks. The LED controller 130 may be integrally installed on the LED fixing substrate 120 or separated from the LED fixing substrate 120 to be installed in the electronic display housing 400. In this case, when the LED fixing substrate 120 and the LED controller 130 are integrally installed, the LED fixing substrate 120 may be more compact by installing the LED controller 130 on the other side of the LED fixing substrate 120.

In addition, when the LED control unit 130 and the LED fixing substrate 120 are separated, the first connector 112a for connection is installed on the other side of the LED fixing substrate 120, and the first connector ( A second connector 112b for connecting to 112a is installed to connect the first and second connectors 112a and 112b with a predetermined cable 114.

On the other hand, the outdoor display board according to the present invention, the LED 110, the LED fixing substrate 120 to which the LED 110 is fixed, and the LED controller 130 for controlling the LED 110 to prevent a short circuit due to moisture. It includes a waterproof structure for. That is, in order to prevent a short circuit caused by moisture between the LED 110, the LED fixing substrate 120, and the LED controller 130, the LED 110, the LED fixing substrate 120, and the LED controller 130 are used in the present invention. The exposed side before and after was coated with a thermoplastic polymer.

As described above, in order to protect the outdoor billboard from moisture and to lightly manufacture the weight of the billboard, a technology of coating the front and rear exposed surfaces of the LED 110, the LED fixing substrate 120, and the LED controller 130 may be a solid state. As a special coating material, the thermoplastic polymer is thermally decomposed in a heating furnace and evaporated into a gaseous state in a vacuum to be changed. In other words, the thermoplastic polymer in the solid state is thermally decomposed in a heating furnace to be evaporated into a gaseous state in a vacuum. {Vaporization (150 ℃) → Pyrolysis (680 ℃)}

Meanwhile, after the thermoplastic polymer is thermally decomposed in a heating furnace and evaporated in a gaseous state in a vacuum, the thermoplastic polymer is evaporated in a gaseous state on the front and rear exposed surfaces of the LED 110, the LED fixing substrate 120, and the LED controller 130. Deposited thermoplastic polymer (Polymer). At this time, the process of depositing a thermoplastic polymer evaporated in the gas state on the exposed surface is performed under vacuum.

Then, after depositing a gaseous thermoplastic polymer on the exposed surfaces of the LED 110, the LED fixing substrate 120, and the LED controller 130, the temperature is lowered and the thermoplasticity of the gaseous state deposited on the pixel exposed surface is reduced. The polymer is solidified so that the pixel exposed surface is coated with a thermoplastic polymer. {Deposit (25 ° C. to -70 ° C.)}

Therefore, in the coating process made as described above, the thermoplastic polymer, which is a coating material of vaporization, is in the form of a dimer molecule, and in the pyrolysis process, the monomer form is formed. In the solidification process, it changes to polymer form.

The moisture-proof coating process according to the present invention is a process of thermally decomposing a thermoplastic polymer in a solid state through a heating furnace to change it into a gaseous monomer form in a vacuum, and converting a monomer-type gas into The process of depositing on the exposed surface of the LED 110, the LED fixing substrate 120 and the LED control unit 130 in a vacuum state, and the process of solidifying the coating of monomer-type gas deposited on the exposed surface of the pixel. Is done. Through this coating process, the thickness of the coating layer is proportional to the amount of the coating agent to be injected, so that the thickness of the coating layer can be adjusted.

The fixing plate 210 is installed on the front surface of the LED fixing substrate 120 to fix the LED 110 and is spaced apart a predetermined distance so that the front surface of the LED fixing substrate 120 can be vented. That is, the fixing plate 210 and the LED fixing substrate 120 maintain a constant interval through the fastening means 300 to form a space A for ventilation and are generated from the LED 110 and the LED fixing substrate 120. The heat to be vented to the outside through the ventilation space (A) to cool the LED 110 and the LED fixing substrate 120.

In addition, the fixing plate 210 is drilled in the insertion hole 200 through which the LED 110 penetrates corresponding to the LED 110, the insertion hole 200 is in close contact with the outer periphery of the LED 110 through the LED ( Fixing 110 and to absorb the heat generated from the LED 110 to be emitted to the outside of the sign. That is, the heat generated by the lighting from the LED 110 penetrating the insertion hole 200 is absorbed by the fixing plate 210 to be discharged to the outside of the electronic plate.

The fixing plate 210 is composed of a metal or plastic material such as aluminum, copper, an alloy of aluminum and copper, in order to effectively dissipate heat generated from the LED 110, preferably aluminum in consideration of conductivity and light weight. .

In addition, the fixing plate 210 may be colored in a constant color so as to be compatible with the surrounding environment. That is, by adding a color that can be harmonized with the color of the installation place to the fixing plate 210, it is possible to improve the design improvement of the display board and improve the visual effect so that it can be harmonized with the surrounding environment of the display board. In this embodiment, in order to add color to the fixing plate 210 made of aluminum, a color is added to the fixing plate 210 by a known electroplating method.

In addition, when the fixing plate 210 is made of a plastic material, color is added to the fixing plate 210 through coloring using enamel.

Meanwhile, as shown in FIG. 7, the front of the fixing plate 210 may include a light blocking plate 220 to prevent the brightness of the LED 110 from being lowered due to sunlight.

In addition, the light blocking plate 220 is composed of a heat dissipation member so as to absorb the heat conducted from the fixing plate 210 in accordance with the lighting of the LED 110 to emit to the outside of the light emitting plate, it is also possible to color in a constant color to be compatible with the surrounding environment. It is possible.

The heat dissipation member is composed of a metal or plastic material such as aluminum, copper, an alloy of aluminum and copper, in order to effectively dissipate heat generated from the LED, preferably aluminum in consideration of conductivity and light weight.

Referring back to FIGS. 5 to 7, the LED housing 400 fixes the LED fixing substrate 120 to the LED panel 410 through the fastening means 310, and heats generated from the LED fixing substrate 120. In order to cool, the LED fixing substrate 120 may be fixed by being spaced apart from the electronic panel panel 410 by a predetermined distance, and at this time, vented to the formed space (B).

The electronic display panel 410 forms a vent 411 in correspondence with the fixed LED fixing substrate 120.

Vent 411 is a heat generated in the back of the LED fixing substrate 120, that is, the heat generated in the space B and the heat generated in the front of the LED 110 and the LED fixing substrate 120, that is, heat generated in the A space is ventilated To facilitate heat dissipation.

In addition, when the LED fixing substrate 120 and the LED controller 130 are separated, the wiring 114 may use the ventilation hole 411 as a path through which the wiring 114 passes.

In addition, the vent 411 is a LED fixing substrate 120 installed on the front of the panel panel 410 during the replacement operation according to the short circuit of the LED 110, the operator disassembles the fastening means 310 in the rear of the panel panel to fix the LED By separating the substrate 100 from the display panel 410 and recovering the separated LED fixing substrate 120 through the vent 411, the need for an operator to replace the LED fixing substrate 120 separated from the front of the display is improved. To improve the working efficiency.

As described above, the outdoor billboard according to the present invention has an advantage of providing an outdoor billboard which is significantly improved in waterproof and light weight than the outdoor billboard in which epoxy or silicon is filled.

In addition, the present invention has an advantage that can provide an outdoor billboard with improved heat emission and maintenance of the LED from the LED.

In addition, the present invention has the advantage that can be repaired to replace only the failed LED can be reused parts, it can provide an environmental protection effect according to the reuse.

In addition, the outdoor billboard according to the prior art has the advantage of improving the efficiency of the work by removing the failed LED module after loosening the screw on the back of the panel in the process of replacing the failed LED module.

In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can vary without departing from the spirit of the technical idea of the present invention described in the claims below. It will be possible to carry out the change.

Claims (6)

Outdoor billboard with waterproof and heat dissipation function, An LED module configured to coat a plurality of LEDs according to an electrical signal and to form a coating layer on the outer surface to block contact with external moisture; A fixing plate spaced apart from a bottom surface of the LED module by a predetermined distance to form a ventilation path between the LED module and installed on the front of the LED module to fix the plurality of LEDs; A light blocking plate installed on the front surface of the fixing plate to prevent the plurality of LED brightness degradation due to sunlight; And An outdoor electronic display board having a waterproof and heat dissipating function including an electronic display board housing accommodating the LED module, the fixing plate, and the light shielding plate, and a vent hole is formed to allow ventilation of a rear surface of the LED module. The method of claim 1, wherein the fixing plate forms an insertion hole through which the LED penetrates corresponding to the plurality of LEDs, and closes the outer circumference of the LED passing through the insertion hole to fix the LED and generate from the LED. The outdoor billboard having a waterproof and heat release function, characterized in that to absorb the heat to be emitted to the outside of the sign. The outdoor display board of claim 1, wherein the fixing plate and the light blocking plate are colored in at least one color to be compatible with the surrounding environment. The outdoor electronic display board of claim 1, wherein the light blocking plate emits heat conducted from the fixing plate. The outdoor electronic display board of claim 1, wherein the fixing plate and the light shielding plate are formed of at least one of a plastic molding material and a metal material. The outdoor electronic sign of claim 1, wherein the vent is inserted into the LED module through the vent when the LED module is replaced.

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